Petroleum engineering has undergone rapid transformation in the last few decades. The refining processes for conversion and extraction of crude oil from petroleum deposits particularly have evolved a lot. This book presents a thorough understanding of petroleum refining processes by discussing some of the significant topics in the field like the extraction procedures, design and maintenance of petroleum refineries, distillation of petroleum and petrochemicals, etc. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. This book will serve as a reference to a broad spectrum of readers.